20902988

素因数分解:

$2^2\times {\mathrm{43}}^1\times {\mathrm{53}}^1\times {\mathrm{2293}}^1$

素因数の和:2393

約数の個数: 24

約数和(自身を含む): 38153808

約数和(自身を除く): 17250820

約数列:

[1, 2, 4, 43, 53, 86, 106, 172, 212, 2279, 2293, 4558, 4586, 9116, 9172, 98599, 121529, 197198, 243058, 394396, 486116, 5225747, 10451494, 20902988]

約数ペア:

[(1, 20902988), (2, 10451494), (4, 5225747), (43, 486116), (53, 394396), (86, 243058), (106, 197198), (172, 121529), (212, 98599), (2279, 9172), (2293, 9116), (4558, 4586)]